Process for removal of hydrogen fluoride

Details Process for removal of hydrogen fluoride Process for removal of hydrogen fluoride

C - Chemistry, Metallurgy

07

C

C07C 17/38 (2006.01) C01B 7/19 (2006.01) C07C 19/03 (2006.01) C07C 19/08 (2006.01) C07C 19/10 (2006.01) C09K 3/00 (2006.01)

Patent

CA 2111007

Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic mixtures of hydrogen fluoride and dichloromethane, hydrogen fluoride and chlorofluoromethane and hydrogen fluoride and difluoromethane are removed, or by liquid-separating the mixture into an upper liquid phase rich in hydrogen fluoride and a lower liquid phase not rich in hydrogen fluoride before each liquid phase is so distilled.

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